From da85df11f766fcfe6f3a1ccf81772827ff8b25c9 Mon Sep 17 00:00:00 2001
From: Sylvain Schneider <s.schneider@sd-innovation.fr>
Date: Tue, 12 May 2026 00:44:18 +0200
Subject: [PATCH] appends requirement edition mode

---
 kwa-ui/src/components/RequirementDetail.vue   | 447 ++++++++++++++++--
 .../src/components/RequirementsTreeList.vue   |  22 +-
 kwa-ui/src/stores/requirements.ts             |  24 +
 kwa-ui/src/views/RequirementsView.vue         |  40 +-
 4 files changed, 466 insertions(+), 67 deletions(-)

diff --git a/kwa-ui/src/components/RequirementDetail.vue b/kwa-ui/src/components/RequirementDetail.vue
index c0d30ce..368e9aa 100644
--- a/kwa-ui/src/components/RequirementDetail.vue
+++ b/kwa-ui/src/components/RequirementDetail.vue
@@ -1,39 +1,181 @@
 <script setup lang="ts">
+import { computed, reactive, ref, watch } from 'vue'
 import Button from 'primevue/button'
 import Chip from 'primevue/chip'
 import Divider from 'primevue/divider'
+import InputText from 'primevue/inputtext'
 import TabView from 'primevue/tabview'
 import TabPanel from 'primevue/tabpanel'
 import Tag from 'primevue/tag'
-
-export interface Requirement {
-  id: number
-  reference: string
-  title: string
-  status: 'Draft' | 'In Review' | 'Approved' | 'Blocked' | 'Delivered'
-  priority: 'Low' | 'Medium' | 'High' | 'Critical'
-  owner: string
-  progress: number
-  dueDate: string
-  description: string
-  rationale: string
-  acceptanceCriteria: string[]
-  impactedModules: string[]
-  blockers: string[]
-  notes: string
-  stakeholders: string[]
-  flexibility: string
-  tolerances: string
-}
+import Textarea from 'primevue/textarea'
+import type { Requirement, RequirementPriority, RequirementStatus } from '../stores/requirements'
 
 interface Props {
   requirement: Requirement
 }
 
-defineProps<Props>()
+interface FormState {
+  title: string
+  owner: string
+  status: RequirementStatus
+  priority: RequirementPriority
+  description: string
+  flexibility: string
+  tolerances: string
+  notes: string
+  stakeholders: string
+  acceptanceCriteria: string
+  impactedModules: string
+  blockers: string
+}
 
-const statusSeverity = (status: Requirement['status']) => {
-  const map: Record<Requirement['status'], 'secondary' | 'info' | 'success' | 'danger' | 'contrast'> = {
+const props = defineProps<Props>()
+
+const emit = defineEmits<{
+  (e: 'save', requirement: Requirement): void
+  (e: 'dirty-change', value: boolean): void
+}>()
+
+const isEditing = ref(false)
+
+const form = reactive<FormState>({
+  title: '',
+  owner: '',
+  status: 'Draft',
+  priority: 'Low',
+  description: '',
+  flexibility: '',
+  tolerances: '',
+  notes: '',
+  stakeholders: '',
+  acceptanceCriteria: '',
+  impactedModules: '',
+  blockers: '',
+})
+
+const errors = reactive<Record<string, string>>({})
+
+const normalizeCsv = (value: string) => csvToList(value).join(',')
+const normalizeMultiline = (value: string) => multilineToList(value).join('|')
+
+const listToCsv = (value: string[]) => value.join(', ')
+const listToMultiline = (value: string[]) => value.join('\n')
+
+const csvToList = (value: string) =>
+  value
+    .split(',')
+    .map((item) => item.trim())
+    .filter(Boolean)
+
+const multilineToList = (value: string) =>
+  value
+    .split('\n')
+    .map((item) => item.trim())
+    .filter(Boolean)
+
+const resetForm = (requirement: Requirement) => {
+  form.title = requirement.title
+  form.owner = requirement.owner
+  form.status = requirement.status
+  form.priority = requirement.priority
+  form.description = requirement.description
+  form.flexibility = requirement.flexibility
+  form.tolerances = requirement.tolerances
+  form.notes = requirement.notes
+  form.stakeholders = listToCsv(requirement.stakeholders)
+  form.acceptanceCriteria = listToMultiline(requirement.acceptanceCriteria)
+  form.impactedModules = listToCsv(requirement.impactedModules)
+  form.blockers = listToMultiline(requirement.blockers)
+}
+
+const clearErrors = () => {
+  Object.keys(errors).forEach((key) => delete errors[key])
+}
+
+const startEdit = () => {
+  resetForm(props.requirement)
+  clearErrors()
+  isEditing.value = true
+}
+
+const cancelEdit = () => {
+  isEditing.value = false
+  clearErrors()
+  resetForm(props.requirement)
+}
+
+const validate = () => {
+  clearErrors()
+
+  if (!form.title.trim()) {
+    errors.title = 'Title is required.'
+  }
+
+  if (!form.owner.trim()) {
+    errors.owner = 'Author is required.'
+  }
+
+  if (!form.description.trim()) {
+    errors.description = 'Description is required.'
+  }
+
+  if (csvToList(form.stakeholders).length === 0) {
+    errors.stakeholders = 'At least one stakeholder is required.'
+  }
+
+  return Object.keys(errors).length === 0
+}
+
+const saveEdit = () => {
+  if (!validate()) {
+    return
+  }
+
+  isEditing.value = false
+
+  emit('save', {
+    ...props.requirement,
+    title: form.title.trim(),
+    owner: form.owner.trim(),
+    status: form.status,
+    priority: form.priority,
+    description: form.description.trim(),
+    flexibility: form.flexibility.trim(),
+    tolerances: form.tolerances.trim(),
+    notes: form.notes.trim(),
+    stakeholders: csvToList(form.stakeholders),
+    acceptanceCriteria: multilineToList(form.acceptanceCriteria),
+    impactedModules: csvToList(form.impactedModules),
+    blockers: multilineToList(form.blockers),
+  })
+
+  clearErrors()
+}
+
+const isDirty = computed(() => {
+  if (!isEditing.value) {
+    return false
+  }
+
+  return (
+    form.title.trim() !== props.requirement.title ||
+    form.owner.trim() !== props.requirement.owner ||
+    form.status !== props.requirement.status ||
+    form.priority !== props.requirement.priority ||
+    form.description.trim() !== props.requirement.description ||
+    form.flexibility.trim() !== props.requirement.flexibility ||
+    form.tolerances.trim() !== props.requirement.tolerances ||
+    form.notes.trim() !== props.requirement.notes ||
+    normalizeCsv(form.stakeholders) !== props.requirement.stakeholders.join(',') ||
+    normalizeCsv(form.impactedModules) !== props.requirement.impactedModules.join(',') ||
+    normalizeMultiline(form.acceptanceCriteria) !==
+      props.requirement.acceptanceCriteria.join('|') ||
+    normalizeMultiline(form.blockers) !== props.requirement.blockers.join('|')
+  )
+})
+
+const statusSeverity = (status: RequirementStatus) => {
+  const map: Record<RequirementStatus, 'secondary' | 'info' | 'success' | 'danger' | 'contrast'> = {
     Draft: 'secondary',
     'In Review': 'info',
     Approved: 'success',
@@ -43,8 +185,8 @@ const statusSeverity = (status: Requirement['status']) => {
   return map[status]
 }
 
-const prioritySeverity = (priority: Requirement['priority']) => {
-  const map: Record<Requirement['priority'], 'success' | 'info' | 'warn' | 'danger'> = {
+const prioritySeverity = (priority: RequirementPriority) => {
+  const map: Record<RequirementPriority, 'success' | 'info' | 'warn' | 'danger'> = {
     Low: 'success',
     Medium: 'info',
     High: 'warn',
@@ -52,42 +194,113 @@ const prioritySeverity = (priority: Requirement['priority']) => {
   }
   return map[priority]
 }
+
+watch(
+  () => props.requirement,
+  (requirement) => {
+    resetForm(requirement)
+    clearErrors()
+    isEditing.value = false
+  },
+  { immediate: true, deep: true }
+)
+
+watch(isDirty, (value) => {
+  emit('dirty-change', value)
+}, { immediate: true })
 </script>
 
 <template>
   <section class="detail-zone">
     <section class="detail-surface">
-      <header class="detail-card__header">
-        <div>
+      <header
+        class="detail-card__header"
+        :class="{ 'detail-card__header--editing': isEditing }"
+      >
+        <div class="detail-card__main">
           <p class="eyebrow">Selected requirement</p>
-          <h2>{{ requirement.title }}</h2>
+          <h2 v-if="!isEditing">{{ requirement.title }}</h2>
+          <InputText
+            v-else
+            v-model="form.title"
+            class="edit-input"
+            placeholder="Requirement title"
+          />
+          <small v-if="errors.title" class="error-text">{{ errors.title }}</small>
           <p class="detail-card__subtitle">
-            {{ requirement.reference }} - Owner: {{ requirement.owner }}
+            {{ requirement.reference }} - Owner: {{ isEditing ? form.owner : requirement.owner }}
           </p>
+          <p class="detail-card__uuid">UUID: {{ requirement.uuid }}</p>
         </div>
 
         <div class="detail-actions">
-          <Button label="Edit" icon="pi pi-pencil" severity="secondary" outlined />
+          <Button
+            v-if="!isEditing"
+            label="Edit"
+            icon="pi pi-pencil"
+            severity="secondary"
+            outlined
+            @click="startEdit"
+          />
         </div>
       </header>
 
       <TabView class="detail-tabs">
         <TabPanel value="details" header="Details">
           <div class="detail-badges">
-            <Tag :value="requirement.status" :severity="statusSeverity(requirement.status)" />
-            <Tag :value="requirement.priority" :severity="prioritySeverity(requirement.priority)" rounded />
+            <Tag
+              v-if="!isEditing"
+              :value="requirement.status"
+              :severity="statusSeverity(requirement.status)"
+            />
+            <select v-else v-model="form.status" class="edit-select">
+              <option value="Draft">Draft</option>
+              <option value="In Review">In Review</option>
+              <option value="Approved">Approved</option>
+              <option value="Blocked">Blocked</option>
+              <option value="Delivered">Delivered</option>
+            </select>
+
+            <Tag
+              v-if="!isEditing"
+              :value="requirement.priority"
+              :severity="prioritySeverity(requirement.priority)"
+              rounded
+            />
+            <select v-else v-model="form.priority" class="edit-select">
+              <option value="Low">Low</option>
+              <option value="Medium">Medium</option>
+              <option value="High">High</option>
+              <option value="Critical">Critical</option>
+            </select>
           </div>
 
-          <p class="detail-description">{{ requirement.description }}</p>
+          <p v-if="!isEditing" class="detail-description">{{ requirement.description }}</p>
+          <div v-else>
+            <Textarea
+              v-model="form.description"
+              class="edit-textarea"
+              rows="3"
+              placeholder="Requirement description"
+            />
+            <small v-if="errors.description" class="error-text">{{ errors.description }}</small>
+          </div>
 
-          <article v-if="requirement.blockers.length" class="info-panel info-panel--warning">
+          <article v-if="isEditing || requirement.blockers.length" class="info-panel info-panel--warning">
             <h3>Identified blockers</h3>
-            <ul class="blockers-list">
+            <ul v-if="!isEditing" class="blockers-list">
               <li v-for="blocker in requirement.blockers" :key="blocker">
                 <i class="pi pi-exclamation-triangle" />
                 <span>{{ blocker }}</span>
               </li>
             </ul>
+            <Textarea
+              v-else
+              v-model="form.blockers"
+              class="edit-textarea"
+              rows="3"
+              placeholder="One blocker per line"
+            />
           </article>
 
           <Divider />
@@ -95,24 +308,50 @@ const prioritySeverity = (priority: Requirement['priority']) => {
           <div class="detail-grid">
             <article class="info-panel">
               <h3>Author</h3>
-              <p>{{ requirement.owner }}</p>
+              <p v-if="!isEditing">{{ requirement.owner }}</p>
+              <div v-else>
+                <InputText v-model="form.owner" class="edit-input" placeholder="Author" />
+                <small v-if="errors.owner" class="error-text">{{ errors.owner }}</small>
+              </div>
             </article>
 
             <article class="info-panel">
               <h3>Stakeholders</h3>
-              <div class="chip-row">
+              <div v-if="!isEditing" class="chip-row">
                 <Chip v-for="stakeholder in requirement.stakeholders" :key="stakeholder" :label="stakeholder" />
               </div>
+              <div v-else>
+                <InputText
+                  v-model="form.stakeholders"
+                  class="edit-input"
+                  placeholder="Comma separated stakeholders"
+                />
+                <small v-if="errors.stakeholders" class="error-text">{{ errors.stakeholders }}</small>
+              </div>
             </article>
 
             <article class="info-panel">
               <h3>Flexibility</h3>
-              <p>{{ requirement.flexibility }}</p>
+              <p v-if="!isEditing">{{ requirement.flexibility }}</p>
+              <Textarea
+                v-else
+                v-model="form.flexibility"
+                class="edit-textarea"
+                rows="2"
+                placeholder="Flexibility constraints"
+              />
             </article>
 
             <article class="info-panel">
               <h3>Tolerances</h3>
-              <p>{{ requirement.tolerances }}</p>
+              <p v-if="!isEditing">{{ requirement.tolerances }}</p>
+              <Textarea
+                v-else
+                v-model="form.tolerances"
+                class="edit-textarea"
+                rows="2"
+                placeholder="Tolerance details"
+              />
             </article>
           </div>
 
@@ -121,24 +360,44 @@ const prioritySeverity = (priority: Requirement['priority']) => {
           <div class="detail-columns">
             <article class="info-panel">
               <h3>Acceptance criteria</h3>
-              <ul class="checklist">
+              <ul v-if="!isEditing" class="checklist">
                 <li v-for="item in requirement.acceptanceCriteria" :key="item">
                   <i class="pi pi-check-circle" />
                   <span>{{ item }}</span>
                 </li>
               </ul>
+              <Textarea
+                v-else
+                v-model="form.acceptanceCriteria"
+                class="edit-textarea"
+                rows="6"
+                placeholder="One acceptance criterion per line"
+              />
             </article>
 
             <article class="info-panel">
               <h3>Impacted modules</h3>
-              <div class="chip-row">
+              <div v-if="!isEditing" class="chip-row">
                 <Chip v-for="module in requirement.impactedModules" :key="module" :label="module" />
               </div>
+              <InputText
+                v-else
+                v-model="form.impactedModules"
+                class="edit-input"
+                placeholder="Comma separated modules"
+              />
 
               <Divider />
 
               <h3>Remarks</h3>
-              <p>{{ requirement.notes }}</p>
+              <p v-if="!isEditing">{{ requirement.notes }}</p>
+              <Textarea
+                v-else
+                v-model="form.notes"
+                class="edit-textarea"
+                rows="4"
+                placeholder="Remarks"
+              />
             </article>
           </div>
         </TabPanel>
@@ -150,6 +409,21 @@ const prioritySeverity = (priority: Requirement['priority']) => {
           </div>
         </TabPanel>
       </TabView>
+
+      <footer v-if="isEditing" class="edit-footer">
+        <Button
+          label="Cancel"
+          icon="pi pi-times"
+          severity="secondary"
+          outlined
+          @click="cancelEdit"
+        />
+        <Button
+          label="Save"
+          icon="pi pi-check"
+          @click="saveEdit"
+        />
+      </footer>
     </section>
   </section>
 </template>
@@ -180,6 +454,24 @@ const prioritySeverity = (priority: Requirement['priority']) => {
   gap: 1rem;
 }
 
+.detail-card__header--editing {
+  display: block;
+}
+
+.detail-card__header--editing .detail-card__main {
+  width: 100%;
+}
+
+.detail-card__header--editing .detail-actions {
+  margin-top: 0.5rem;
+  justify-content: flex-start;
+}
+
+.detail-card__main {
+  flex: 1;
+  min-width: 0;
+}
+
 .eyebrow {
   margin: 0;
   text-transform: uppercase;
@@ -200,6 +492,13 @@ const prioritySeverity = (priority: Requirement['priority']) => {
   font-size: 0.82rem;
 }
 
+.detail-card__uuid {
+  margin: 0.35rem 0 0;
+  color: #7c8aa5;
+  font-size: 0.75rem;
+  font-family: 'Consolas', 'Courier New', monospace;
+}
+
 .detail-actions {
   display: flex;
   flex-wrap: wrap;
@@ -207,6 +506,14 @@ const prioritySeverity = (priority: Requirement['priority']) => {
   gap: 0.5rem;
 }
 
+.edit-footer {
+  display: flex;
+  justify-content: flex-end;
+  gap: 0.5rem;
+  padding-top: 0.75rem;
+  border-top: 1px solid rgba(96, 117, 156, 0.12);
+}
+
 .detail-tabs {
   min-height: 0;
   flex: 1;
@@ -218,6 +525,38 @@ const prioritySeverity = (priority: Requirement['priority']) => {
   min-height: 0;
 }
 
+:deep(.detail-tabs .p-tabview-nav-container),
+:deep(.detail-tabs .p-tabview-nav-content),
+:deep(.detail-tabs .p-tabview-nav) {
+  width: 100%;
+  min-width: 0;
+  box-sizing: border-box;
+}
+
+:deep(.detail-tabs .p-tabview-nav) {
+  position: relative;
+  border-bottom: 1px solid rgba(96, 117, 156, 0.2) !important;
+}
+
+:deep(.detail-tabs .p-tabview-nav::before),
+:deep(.detail-tabs .p-tabview-nav::after) {
+  content: none !important;
+}
+
+:deep(.detail-tabs .p-tabview-ink-bar) {
+  display: none !important;
+}
+
+:deep(.detail-tabs [role='tab']) {
+  border-bottom: 2px solid transparent !important;
+  margin-bottom: -1px;
+}
+
+:deep(.detail-tabs [role='tab'][aria-selected='true']) {
+  border-bottom-color: #2563eb !important;
+  color: #1d4ed8 !important;
+}
+
 :deep(.detail-tabs .p-tabview-panels) {
   flex: 1;
   min-height: 0;
@@ -326,6 +665,27 @@ const prioritySeverity = (priority: Requirement['priority']) => {
   font-size: 2.5rem;
 }
 
+.edit-input,
+.edit-textarea,
+.edit-select {
+  width: 100%;
+}
+
+.edit-select {
+  border: 1px solid #cbd5e1;
+  border-radius: 0.5rem;
+  padding: 0.45rem 0.6rem;
+  background: #fff;
+  color: #334155;
+}
+
+.error-text {
+  display: block;
+  margin-top: 0.35rem;
+  color: #b91c1c;
+  font-size: 0.75rem;
+}
+
 @media (max-width: 1120px) {
   .detail-grid,
   .detail-columns {
@@ -349,6 +709,3 @@ const prioritySeverity = (priority: Requirement['priority']) => {
   }
 }
 </style>
-
-
-
diff --git a/kwa-ui/src/components/RequirementsTreeList.vue b/kwa-ui/src/components/RequirementsTreeList.vue
index f334b9f..aa993ee 100644
--- a/kwa-ui/src/components/RequirementsTreeList.vue
+++ b/kwa-ui/src/components/RequirementsTreeList.vue
@@ -3,23 +3,7 @@ import { computed, ref } from 'vue'
 import InputText from 'primevue/inputtext'
 import Tree from 'primevue/tree'
 import Tag from 'primevue/tag'
-
-export interface Requirement {
-  id: number
-  reference: string
-  title: string
-  status: 'Draft' | 'In Review' | 'Approved' | 'Blocked' | 'Delivered'
-  priority: 'Low' | 'Medium' | 'High' | 'Critical'
-  owner: string
-  progress: number
-  dueDate: string
-  description: string
-  rationale: string
-  acceptanceCriteria: string[]
-  impactedModules: string[]
-  blockers: string[]
-  notes: string
-}
+import type { Requirement, RequirementPriority, RequirementStatus } from '../stores/requirements'
 
 export interface TreeNode {
   key: string
@@ -91,7 +75,7 @@ const filteredTreeData = computed(() => {
 
 const statusSeverity = (status: Requirement['status']) => {
   const map: Record<
-    Requirement['status'],
+    RequirementStatus,
     'secondary' | 'info' | 'success' | 'danger' | 'contrast'
   > = {
     Draft: 'secondary',
@@ -104,7 +88,7 @@ const statusSeverity = (status: Requirement['status']) => {
 }
 
 const prioritySeverity = (priority: Requirement['priority']) => {
-  const map: Record<Requirement['priority'], 'success' | 'info' | 'warn' | 'danger'> = {
+  const map: Record<RequirementPriority, 'success' | 'info' | 'warn' | 'danger'> = {
     Low: 'success',
     Medium: 'info',
     High: 'warn',
diff --git a/kwa-ui/src/stores/requirements.ts b/kwa-ui/src/stores/requirements.ts
index 1c6b009..92bb641 100644
--- a/kwa-ui/src/stores/requirements.ts
+++ b/kwa-ui/src/stores/requirements.ts
@@ -7,6 +7,7 @@ export type RequirementPriority = 'Low' | 'Medium' | 'High' | 'Critical'
 export interface Requirement {
   id: number
   reference: string
+  uuid: string
   title: string
   status: RequirementStatus
   priority: RequirementPriority
@@ -29,6 +30,7 @@ export const useRequirementsStore = defineStore('requirements', () => {
     {
       id: 101,
       reference: 'REQ-101',
+      uuid: '9f6c4f7a-9d2f-4dc0-8fa2-7ac2d79b0c11',
       title: 'Full requirement traceability',
       status: 'Approved',
       priority: 'Critical',
@@ -54,6 +56,7 @@ export const useRequirementsStore = defineStore('requirements', () => {
     {
       id: 102,
       reference: 'REQ-102',
+      uuid: '8aa1b6f5-2378-4c47-b490-2b92c7ee8b5f',
       title: 'Business status management',
       status: 'In Review',
       priority: 'High',
@@ -79,6 +82,7 @@ export const useRequirementsStore = defineStore('requirements', () => {
     {
       id: 103,
       reference: 'REQ-103',
+      uuid: '6f99d740-67bf-4a1f-88f2-4fd947f9cb8a',
       title: 'Fast search and filtering',
       status: 'Draft',
       priority: 'Medium',
@@ -104,6 +108,7 @@ export const useRequirementsStore = defineStore('requirements', () => {
     {
       id: 104,
       reference: 'REQ-104',
+      uuid: 'f47e5f4a-c54d-46c9-8fef-f5f56e5e4d7a',
       title: 'Delivery scope by release',
       status: 'Blocked',
       priority: 'Critical',
@@ -152,11 +157,30 @@ export const useRequirementsStore = defineStore('requirements', () => {
     return { total, approvedCount, blockedCount, criticalCount }
   })
 
+  const updateRequirement = (updatedRequirement: Requirement) => {
+    const index = requirements.value.findIndex(
+      (requirement) => requirement.id === updatedRequirement.id
+    )
+
+    if (index === -1) {
+      return
+    }
+
+    requirements.value[index] = {
+      ...updatedRequirement,
+      acceptanceCriteria: [...updatedRequirement.acceptanceCriteria],
+      impactedModules: [...updatedRequirement.impactedModules],
+      blockers: [...updatedRequirement.blockers],
+      stakeholders: [...updatedRequirement.stakeholders],
+    }
+  }
+
   return {
     requirements,
     selectedId,
     searchQuery,
     selectedRequirement,
     stats,
+    updateRequirement,
   }
 })
diff --git a/kwa-ui/src/views/RequirementsView.vue b/kwa-ui/src/views/RequirementsView.vue
index f6d81dd..a2b1b88 100644
--- a/kwa-ui/src/views/RequirementsView.vue
+++ b/kwa-ui/src/views/RequirementsView.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, onBeforeUnmount } from 'vue'
+import { computed, onBeforeUnmount, ref } from 'vue'
 import { storeToRefs } from 'pinia'
 import Splitter from 'primevue/splitter'
 import SplitterPanel from 'primevue/splitterpanel'
@@ -15,6 +15,8 @@ const requirementsStore = useRequirementsStore()
 const { requirements, selectedId, searchQuery, selectedRequirement, stats } =
   storeToRefs(requirementsStore)
 
+const hasUnsavedChanges = ref(false)
+
 const splitterDraggingClass = 'is-splitter-dragging'
 
 const onSplitterResizeStart = () => {
@@ -81,6 +83,34 @@ const buildTreeData = (): TreeNode[] => {
 }
 
 const treeData = computed(() => buildTreeData())
+
+const onSaveRequirement = (updatedRequirement: Requirement) => {
+  requirementsStore.updateRequirement(updatedRequirement)
+  hasUnsavedChanges.value = false
+}
+
+const onDetailDirtyChange = (value: boolean) => {
+  hasUnsavedChanges.value = value
+}
+
+const onSelectRequirement = (nextId: number) => {
+  if (nextId === selectedId.value) {
+    return
+  }
+
+  if (hasUnsavedChanges.value) {
+    const confirmed = window.confirm(
+      'You have unsaved changes. Switching requirement will discard them. Continue?'
+    )
+
+    if (!confirmed) {
+      return
+    }
+  }
+
+  hasUnsavedChanges.value = false
+  selectedId.value = nextId
+}
 </script>
 
 <template>
@@ -98,12 +128,16 @@ const treeData = computed(() => buildTreeData())
           :selectedId="selectedId"
           :stats="stats"
           @update:searchQuery="searchQuery = $event"
-          @update:selectedId="selectedId = $event"
+          @update:selectedId="onSelectRequirement"
         />
       </SplitterPanel>
 
       <SplitterPanel :size="72" :min-size="35">
-        <RequirementDetail :requirement="selectedRequirement" />
+        <RequirementDetail
+          :requirement="selectedRequirement"
+          @save="onSaveRequirement"
+          @dirty-change="onDetailDirtyChange"
+        />
       </SplitterPanel>
     </Splitter>
   </section>